This movie exists to burn down everything the TV series built and rebuild it in blood and neon. Production I.G. animates like they're trying to prove something, every frame a deliberate choice of color and weight that makes even the quiet moments feel like they're about to break. The final act doesn't just resolve the plot, it deconstructs the entire premise and leaves you staring at what was actually happening all along.
In a Tokyo where a youth ordinance imposes curfews on minors and restricts their internet use, underground hackers calling themselves SIRRUT push back against Fumito Nanahara, a political power broker who holds the city in a tight grip. Their digging uncovers Tower, a secret organization backing Fumito that experiments on human beings. When SIRRUT plans a subway ambush to expose the truth, monstrous creatures appear and attack the passengers. Into this chaos steps Saya, a young swordswoman who slays these Old Ones. She lost everything she loved in a horrific incident in Ukishima Province, and she has vowed to make the one responsible pay. SIRRUT recruits her against their shared enemy, and her path toward vengeance on Fumito is marked by tragedy and betrayal.